Automatic ventilator



FIG. 1 is a top perspective view of an automatic ventilator showing mynew design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational viewbeing a mirror image;

FIG. 4 is a left end elevational view thereof;

FIG. 5 is a right end elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top perspective view of another embodiment of my new design;

FIG. 8 is a top plan view thereof;

FIG. 9 is a front elevational view thereof, the rear elevational viewbeing a mirror image;

FIG. 10 is a left end elevational view thereof;

FIG. 11 is a right end elevational view thereof; and

FIG. 12 is a bottom plan view thereof.

The ornamental design for an automatic ventilator, as shown anddescribed.